Thanks for sharing the presentation with us, Jill. I really got a sense that you are passionate about cave/ice diving.
Perhaps it was just me, but there seemed to be somewhat of a disconnect between the discussion of "fear"/fear response and articulation of the case for political activism in the realm of water/nature conservation. I got the feeling that you mashed two or three different talks into one presentation.
On another note, I think it would have been nice to hear concrete examples of findings generated by "scary" cave/ice dives that made the risk worthwhile. Without such examples, it's hard not to think of cave divers as explorers primarily concerned with challenging themselves (conquering the unknown or overcoming their own fears) and secondarily getting behind a convenient ecological cause to justify the personal risks which they take. I guess I found the talk rather unfulfilling in that sense.
Once again thanks for sharing the talk with us.